CN104613388A - Backlight source and display device - Google Patents
Backlight source and display device Download PDFInfo
- Publication number
- CN104613388A CN104613388A CN201510092113.3A CN201510092113A CN104613388A CN 104613388 A CN104613388 A CN 104613388A CN 201510092113 A CN201510092113 A CN 201510092113A CN 104613388 A CN104613388 A CN 104613388A
- Authority
- CN
- China
- Prior art keywords
- light source
- backlight
- drive plate
- negative terminal
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
- F21V19/0015—Fastening arrangements intended to retain light sources
- F21V19/0025—Fastening arrangements intended to retain light sources the fastening means engaging the conductors of the light source, i.e. providing simultaneous fastening of the light sources and their electric connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133612—Electrical details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a backlight source and a display device. The backlight source comprises a grounding structure, a light source and a driving board for driving the light source to emit light, wherein the driving board comprises a positive terminal and a negative terminal which are used for providing a potential difference; the positive terminal is connected with the positive electrode of the light source; the negative terminal and the negative electrode of the light source are connected with the grounding structure; the light source and the driving board form a loop through the grounding structure. According to the backlight source provided by the invention, the negative terminal of the driving board, the negative electrode of the light source and the grounding structure are connected, so that connection between the negative terminal of the driving board and the negative electrode of the light source can be realized without a connector and a connection line. Compared with the prior art, the quantity of the connection lines pins in the backlight source and the quantity of pins on the connector can be greatly reduced, and the complexity of wire arrangement in the backlight source is reduced.
Description
Technical field
The present invention relates to display field, particularly relate to a kind of backlight and display unit.
Background technology
At present, in large scale liquid crystal display product, especially on the liquid crystal display product with local backlight adjustment (Localdimming) function, usually require that LED-backlit is divided into comparatively multizone, but, because LED-backlit is divided into comparatively multizone, in order to realize the connection of LED lamp bar in each region and LED drive board, need the lamp bar line of a greater number, and increase pin (Pin pin) quantity of connector in LED drive board and LED lamp panel, thus improve the complexity connected up in backlight.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention how to reduce the complexity connected up in backlight.
(2) technical scheme
For solving the problems of the technologies described above, technical scheme of the present invention provides a kind of backlight, comprise ground structure, light source and for driving the drive plate of described light source luminescent, described drive plate comprises positive terminal and negative terminal for providing electrical potential difference, described positive terminal is connected with the anode of described light source, the negative electrode of described negative terminal, described light source is connected with described ground structure, and described light source and described drive plate form loop by described ground structure.
Further, described drive plate comprises supply module, constant-current control module and current sampling module;
The positive pole of described supply module is connected with described positive terminal, the negative pole of described supply module is connected with described negative terminal, described current sampling module is arranged in described loop to detect the electric current in described loop, described constant-current control module is connected with described current sampling module, described supply module, and the result that described constant-current control module detects according to described current sampling module carries out power supply control to described supply module.
Further, described current sampling module is arranged between the positive pole of described supply module and the anode of described light source.
Further, described ground structure comprises the metal backing be arranged in described backlight.
Further, described drive plate is fixed on described metal backing by the first metalwork be connected with described negative terminal, and realizes the electrical connection of described negative terminal and described metal backing by described first metalwork.
Further, also comprise the lamp plate for carrying described light source, described lamp plate is fixed on described metal backing by the second metalwork be connected with the negative electrode of described light source, and realizes the negative electrode of described light source and the electrical connection of described metal backing by described second metalwork.
Further, described light source is LED lamp bar.
For solving the problems of the technologies described above, present invention also offers a kind of display unit, comprising above-mentioned arbitrary backlight.
(3) beneficial effect
Backlight provided by the invention, by the negative terminal of drive plate, the negative electrode of light source are connected with ground structure, and the connection of the negative terminal of drive plate and the negative electrode of light source need not be realized again by connector and connecting line, compared to existing technology, the quantity of pin on connecting line in backlight and connector can be greatly reduced, and then reduce the complexity connected up in backlight.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of backlight that embodiment of the present invention provides;
Fig. 2 is the schematic diagram of the another kind of backlight that embodiment of the present invention provides;
Fig. 3 is the schematic diagram of another backlight that embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
See Fig. 1, Fig. 1 is the schematic diagram of a kind of backlight that embodiment of the present invention provides, this backlight comprises ground structure 1, light source 2 and for driving the drive plate 3 of described light source 2 luminescence, described drive plate 3 comprises positive terminal and negative terminal for providing electrical potential difference, described positive terminal is connected with the anode of described light source 2, the negative electrode of described negative terminal, described light source 2 is connected with described ground structure 1, and described light source 2 forms loop with described drive plate 3 by described ground structure 1.
The backlight that embodiment of the present invention provides, by the negative terminal of drive plate, the negative electrode of light source are connected with ground structure, and the connection of the negative terminal of drive plate and the negative electrode of light source need not be realized again by connector and connecting line, compared to existing technology, the quantity of pin on connecting line in backlight and connector can be greatly reduced, and then reduce the complexity of backlight wiring.
Wherein, above-mentioned light source can be LED lamp bar, is the schematic diagram of the another kind of backlight that embodiment of the present invention provides see Fig. 2, Fig. 2, and this backlight comprises ground structure 1, lamp plate 4 and for driving the drive plate 3 of LED lamp bar 2 luminescence on lamp plate 4;
Wherein, drive plate 3 comprises supply module 31, constant-current control module 32 and current sampling module 33; The positive pole of supply module 31 is connected with the positive terminal of drive plate, the negative pole of supply module 31 is connected with the negative terminal of drive plate, current sampling module 33 is arranged in the loop that lamp plate and drive plate formed to detect the electric current in loop, constant-current control module 32 is connected with current sampling module 33, supply module 31, and the result that constant-current control module 32 detects according to current sampling module carries out power supply control to described supply module;
Particularly, as shown in Figure 2, drive plate 3 and lamp plate 4 are equipped with connector, for the connector on drive plate 3, its input pin is connected with the positive terminal of drive plate 3, its N number of output pin is connected with N number of input pin of connector on lamp plate 4 one by one by N bar lamp bar line, on lamp plate 4, N number of output pin of connector is connected one by one with the anode of N number of LED lamp bar respectively, on lamp plate 4, the negative electrode of N number of LED lamp bar is all connected with ground structure 1, and be also connected with ground structure 1 due to the negative terminal of drive plate 3, make the LED lamp bar on drive plate and lamp plate to form loop thus make LED lamp bar luminous,
Preferably, in above-mentioned drive plate, as shown in Figure 2, between the positive pole that current sampling module 33 can be arranged on supply module 31 and the anode of LED lamp bar, and the negative electrode of LED lamp bar is directly connected with ground structure.
The backlight that embodiment of the present invention provides, by the negative terminal by drive plate, the negative electrode of LED lamp bar is directly connected with ground structure, and current sampling module is arranged on anode one end of LED lamp bar, be embodied as the current sampling method of LED anode end, the electric current flowing through LED lamp bar is made to flow back to LED drive board by ground structure, realize the loop between drive plate and LED lamp bar, compared to existing technology, the quantity of pin on connecting line in backlight and connector can be greatly reduced, thus reduce the complexity of backlight wiring, and then improve the manufacturability of complete machine and module, and can reduce costs.
Because current display unit includes ground structure, and for same display unit, the electromotive force of ground structure in position of its inside is all identical, therefore, by the negative electrode of the negative terminal of above-mentioned drive plate, light source all being connected the loop structure that ground structure just can realize between light source and drive plate.
Such as, for current display unit, ground structure comprises the metal backing be arranged on wherein, therefore, metal backing can be utilized to connect the negative terminal of drive plate, the negative electrode of light source, particularly, see Fig. 3, Fig. 3 is the schematic diagram of another backlight that embodiment of the present invention provides, and this backlight comprises as the metal backing of ground structure, lamp plate 4 and for driving the drive plate 3 of LED lamp bar 2 luminescence on lamp plate 4;
Wherein, the mode in the connected mode of the structure of drive plate 3 and drive plate and lamp plate and Fig. 2 is identical, repeats no more herein;
For the connected mode of drive plate 3 with metal backing, as shown in Figure 3, drive plate 3 is fixed on metal backing by the first metalwork 5 be connected with the negative terminal of drive plate, and realizes the electrical connection of drive plate negative terminal and described metal backing by the first metalwork 5.Such as, through hole can be offered in the dielectric base of drive plate, negative terminal be caused through hole edge, then utilize metal screws via through holes to be fixed on metal backing, realize the electrical connection of negative terminal and metal backing simultaneously;
For the connected mode of lamp plate 4 with metal backing, as shown in Figure 3, described lamp plate is fixed on described metal backing by the second metalwork 6 be connected with the negative electrode of described light source, and realizes the negative electrode of described light source and the electrical connection of described metal backing by described second metalwork 6.Such as, through hole can be offered in the dielectric base of lamp plate, the negative pole of LED lamp bar is caused through hole edge, then utilize metal screws via through holes to be fixed on metal backing, realize the negative pole of LED lamp bar and the electrical connection of metal backing simultaneously.
In addition, embodiment of the present invention additionally provides a kind of display unit, comprises above-mentioned backlight.The display unit that embodiment of the present invention provides can be any product or parts with Presentation Function such as note-book computer display screen, liquid crystal display, LCD TV, DPF, mobile phone, panel computer.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (8)
1. a backlight, it is characterized in that, comprise ground structure, light source and for driving the drive plate of described light source luminescent, described drive plate comprises positive terminal and negative terminal for providing electrical potential difference, described positive terminal is connected with the anode of described light source, the negative electrode of described negative terminal, described light source is connected with described ground structure, and described light source and described drive plate form loop by described ground structure.
2. backlight according to claim 1, is characterized in that, described drive plate comprises supply module, constant-current control module and current sampling module;
The positive pole of described supply module is connected with described positive terminal, the negative pole of described supply module is connected with described negative terminal, described current sampling module is arranged in described loop to detect the electric current in described loop, described constant-current control module is connected with described current sampling module, described supply module, and the result that described constant-current control module detects according to described current sampling module carries out power supply control to described supply module.
3. backlight according to claim 2, is characterized in that, described current sampling module is arranged between the positive pole of described supply module and the anode of described light source.
4. backlight according to claim 1, is characterized in that, described ground structure comprises the metal backing be arranged in described backlight.
5. backlight according to claim 4, it is characterized in that, described drive plate is fixed on described metal backing by the first metalwork be connected with described negative terminal, and realizes the electrical connection of described negative terminal and described metal backing by described first metalwork.
6. backlight according to claim 4, it is characterized in that, also comprise the lamp plate for carrying described light source, described lamp plate is fixed on described metal backing by the second metalwork be connected with the negative electrode of described light source, and realizes the negative electrode of described light source and the electrical connection of described metal backing by described second metalwork.
7., according to the arbitrary described backlight of claim 1-6, it is characterized in that, described light source is LED lamp bar.
8. a display unit, is characterized in that, comprise as arbitrary in claim 1-7 as described in backlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092113.3A CN104613388A (en) | 2015-02-28 | 2015-02-28 | Backlight source and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092113.3A CN104613388A (en) | 2015-02-28 | 2015-02-28 | Backlight source and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104613388A true CN104613388A (en) | 2015-05-13 |
Family
ID=53147971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510092113.3A Pending CN104613388A (en) | 2015-02-28 | 2015-02-28 | Backlight source and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104613388A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911756A (en) * | 2016-05-18 | 2016-08-31 | 青岛海信电器股份有限公司 | Backlight module and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114079A (en) * | 2006-07-28 | 2008-01-30 | 三星电子株式会社 | Backlight assembly and display apparatus having the same |
| CN202190214U (en) * | 2011-08-03 | 2012-04-11 | 深圳市赛其创新科技有限公司 | Integrated power supply circuit for liquid crystal display device |
| CN103648205A (en) * | 2013-11-11 | 2014-03-19 | 吕大明 | HVLED steady-light wide-voltage driver |
| CN204005312U (en) * | 2014-03-24 | 2014-12-10 | 东莞高仪电子科技有限公司 | The high-voltage impulse protection circuit of LED lamp plate, LED lamp plate and LED light fixture |
-
2015
- 2015-02-28 CN CN201510092113.3A patent/CN104613388A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114079A (en) * | 2006-07-28 | 2008-01-30 | 三星电子株式会社 | Backlight assembly and display apparatus having the same |
| CN202190214U (en) * | 2011-08-03 | 2012-04-11 | 深圳市赛其创新科技有限公司 | Integrated power supply circuit for liquid crystal display device |
| CN103648205A (en) * | 2013-11-11 | 2014-03-19 | 吕大明 | HVLED steady-light wide-voltage driver |
| CN204005312U (en) * | 2014-03-24 | 2014-12-10 | 东莞高仪电子科技有限公司 | The high-voltage impulse protection circuit of LED lamp plate, LED lamp plate and LED light fixture |
Non-Patent Citations (1)
| Title |
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| 周志敏 等: "《单片电荷泵实用电路》", 31 January 2009 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911756A (en) * | 2016-05-18 | 2016-08-31 | 青岛海信电器股份有限公司 | Backlight module and display device |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150513 |
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| RJ01 | Rejection of invention patent application after publication |